| Acronym | Definition |
|---|
| HSST | High Speed Surface Transport |
| HSST | Health and Social Services Trust (UK) |
| HSST | Heavy-Section Steel Technology |
| HSST | Hybrid Shape-Shifting Trie (router table partitioning) |
| HSST | High School Student |
| HSST | High Speed Steel Track |
| HSST | High School Scheduling and Transcripts |
| HSST | Higher Secondary School Teachers |
| HSST | Human/Social Services Technology |
| HSST | Historical Sea Surface Temperature |
| HSST | Hayden Synchronized Skating Teams |
| HSST | High Speed Systems and Trains |
| HSST | Heat and Salt Stress Tolerance |
| HSST | High School Subject Test |
| HSST | Hygiène, Sécurité et Situation de Travail (French: occupational health and safety) |
| HSST | Hollow Structural Steel Tubing |